Apparatus for molding glass pipes.



No. 658,088. Patented Sept. I8, |900. S. JONES.

APPARATUS FOR MOLDING GLASS PIPES.

(Application med nec. 16, 1899.)

(No Model.) l

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l' f l 25 UNITED STATES vPATENT OFFICE. I

STEPHEN JONES, OF DUhLlMORE, PENNSYLVANIA.

APPARATUS FOR IVIOLDING GLASS PIPES.

SPECIFICATION forming part of Letters l'atent No. 658,(188, datedSeptember 18, 1900. Application filed December 16, 1899; Serial No.'740,58. (No model.)

To all whom it Weary concern: f

Beit known that I, STEPHEN JoNEs,.a citizen of the United States,residing at Dunmore, in the county of Lackawanna and State ofPennsylvania, have invented certain new and useful Improvements inApparatus for Molding Glass Pipes, of which the following is aspecification.

My invention relates to improvements in apparatus for casting glasspipes; and it consists in a simple form of collapsible and separablecore and a mold adapted to receive the same.

In the accompanying drawings,which illustrate my invention, Figure 1 isa plan View ofthe apparatus, the upper part of the mold being thrownback and partly broken away. Fig. 2 is a perspective view of the samewith the mold closed. Fig. 3 is a similar view of the core, one of thestaves being removed. Fig. 4 is a similar View of one of the stavesforming the core, and Fig. 5 is a View of the core with the heads movedapart.

Referring to the drawings, 1 indicates the lower portion of the mold,and 2 and 3 indicate the two parts forming the upper half of the mold,said parts being connected to the lower half by hinges 4. A longitudinaltapering slot 5 is formed in the upper side of the mold, through whichthe molten glass is to be poured, and the two hinged portions may belocked together by suitable catches 6. An opening 7 is formed at oneside of the mold, and Within said opening is arranged a threaded rod 8,said rod being supported by a bracket 9, having a threaded openingtherein. By means of a crank 10 the rod may be moved through the opening7, so that its threaded end 1l may be ext-ended across the space betweenthe interior of the mold and the eX- terior of the core 12, and byreversing the movement of the crank the end of the rod may be withdrawnfrom the interior of the mold. The rod serves the purpose of a core, bymeans of which a hole is formed in the side of the pipe into which atap-pipe mayl afterward be inserted. Preferably the end 11 of the rod isthreaded, as shown, so as to form a threaded opening in the pipe.

The core 12 consists of a series of tapering staves 13, having lugs 14projecting centrally from their wider ends, and a pair of heads 15 and16, to which said staves are hinged. As shown, each head is formed witha pair of diametrically-opposite radial slots 17,through vwhich thelugs'l-i extend, and said Ylugs are ypivotally secured betweenprojecting blocks drawn toward each other by means of a suitable wedge22, extending through a slot 23 in the end of the rod. When the headsare thus drawn together, it will be seen that the narrow ends of thestaves will be forced into the slots or pockets 19 in the opposing headsand that the staves will be wedged together at their edges throughouttheir length, thus forming a practically-unbroken cylindrical surface.

In order to facilitate the assembling of the two parts of the mold, Iprovide upon the inner sides of each head a conical' or inclined face24, so that when the parts are brought into the'position indicated inFig. 5 preparatory to locking them together by means of the bolt and theheads are forced toward each other the ends 2O will be spread apart andguided into the pockets 19 by the inclined faces 24. A tapering ring 27is placed upon one end of the core to form a bell-mouth in the pipe, andwhen the core is in place this ring rests against the end of the mold.After the core is arranged within the mold the rod `8 is turned so as toforce its end 11 into contact with the core. The molten glass is thenpoured into the mold through the slot 5, and

as soon asit becomes partly set the crank 10 is IOC pockets and to fallinwardly, as shown in Fig. 5, thus permitting the glass pipe to shrinkWithout binding upon the core. The two parts of the core are thenremoved from the opposite ends of the mold, and the completed pipe maybe then removed. It will be seen that should any of the molten glass byany possibility run between the staves, the latter, owing to theirtapering form, may be drawn apart without breaking the glass or stickingin the mold.

Having described my invention, what I claim, and desire to secure byLetters Patent of the United States, is-

l. A core for glass-molds consisting of two heads separably connectedtogether, each head having hinged thereto a series of tapering staves,the staves connected with one of said heads tting between the stavesconnected with the opposing heads to form a cylinder.

2. A core for glass-molds consisting of two heads separably connectedtogether, each head having hinged thereto a series of separated,tapering staves, and having openings or pockets between said stavesadapted to receive the narrow ends of the staves connected with theopposing head.

3. A core for glass-molds consisting of two heads separably connectedtogether, each head having hinged thereto a series of separated,tapering staves, and having openings or pockets between said stavesadapted to receive the narrow ends of the staves connected with theopposing head, conical or tapering faces upon the heads adjacent to saidpockets, and means for adjusting said heads toward each other to forcethe staves together.

4. A core for glass-molds consisting of two heads each having hingedthereto a series of separated, tapering staves, and having openings orpockets between said staves adapted to receive the narrow ends of thestaves connected with the opposing head, conical or tapering faces uponthe heads adjacent to said pockets, and a removable bolt securing saidheads together.

5. A collapsible core for glass-molds formed in -two separable parts,each part consisting of a head and a series of tapering staves hingedthereto, the staves connected with one of said heads fitting between thestaves connected with the opposing head to form a cylinder, and meansfor moving said parts in opposite directions to separate the core.

VIn testimony whereof I affix :my signature in presence of twowitnesses.

STEPHEN JONES.

Witnesses:

ROBERT WATSON, FLORA Lnvi.

